Effect of calcination temperature on the electrochemical properties of nickel-rich LiNi0.76Mn0.14Co0.10O2 cathodes for lithium-ion batteries

Surface/Interface Structure Degradation of Ni‐Rich Layered Oxide Cathodes toward Lithium‐Ion Batteries: Fundamental Mechanisms and Remedying Strategies

“…As discussed above, the content of Li residues and the level of cation disorder depend highly on the synthetic conditions, particularly for the contributions from the particle size, Li‐excess content, calcination temperature, calcination atmosphere, and heating/cooling rate. In particular, Wang et al investigate the kinetic and thermodynamic aspects of cationic ordering during synthesis of Ni‐rich cathodes by adjusting the sintering temperature and time .…”

“…Copyright 2018, Royal Society of Chemistry. c) SEM images of the LiNi 0.76 Mn 0.14 Co 0.10 O 2 cathodes prepared at different calcination temperatures as indicated after 200 cycles at C/3 in the voltage range of 2.7−4.5 V. Reproduced with permission . Copyright 2018, Elsevier Ltd. d,e) Valence state maps of the Ni, Co, and Mn ions for the respective regions across the grain boundary in the two samples with different ratio of Li to TM ions.…”

Sintering Temperature Induced Evolution of Microstructures and Enhanced Electrochemical Performances: Sol-Gel Derived LiFe(MoO4)2 Microcrystals as a Promising Anode Material for Lithium-Ion Batteries

“…It is obvious that the R s , R f , and R ct for LFM-650 are much smaller compared with those of LFM-600, LFM-680, and LFM-700, demonstrating that LFM-650 possesses a more stable surface film and a faster charge transfer process, leading to the enhancement of lithium storage performance. More importantly, the notable increase in R ct for LFM-600, LFM-680, and LFM-700 indicated that these electrode materials own higher kinetic barrier for lithium ions insertion/extraction, thus resulting in poor electrochemical performance (Zheng J. M. et al, 2018 ), just like what is displayed in Figures 6B,C .…”

Hydrothermal Synthesis of Tunable Olive‐Like Ni0.8Co0.1Mn0.1CO3 and its Transformation to LiNi0.8Co0.1Mn0.1O2 Cathode Materials for Li‐Ion Batteries

“…With the large‐scale industrialization of high‐energy LIBs increasingly grown, requirements for high energy density are becoming more and more strict, the commonly used cathode materials with relatively low practical discharge specific capacity, such as layered LiCoO 2 (∼140 mAh g −1 , upper cutoff voltage of 4.2 V), spinel LiMn 2 O 4 (∼120 mAh g −1 ), and olivine LiFePO 4 (∼170 mAh g −1 ), cannot satisfy the demands of electric vehicles and energy storage systems. To improve the energy density of cathode materials, Ni‐rich layered LiNi x Co y Mn 1‐ x ‐ y O 2 (LNCMO) cathode materials (x≥0.60) have been extensively researched and developed . Generally speaking, Ni element brings the high‐capacity and lower cost for cathode materials, Co element is mainly responsible for the suppression of Ni 2+ /Li + cation disorder and the improvement of electronic conductivity, while Mn element stabilizes the crystal structure and reduces the cost …”

“…To improve the energy density of cathode materials, Ni-rich layered Li-Ni x Co y Mn 1-x-y O 2 (LNCMO) cathode materials (x � 0.60) have been extensively researched and developed. [14] Generally speaking, Ni element brings the high-capacity and lower cost for cathode materials, Co element is mainly responsible for the suppression of Ni 2 + /Li + cation disorder and the improvement of electronic conductivity, while Mn element stabilizes the crystal structure and reduces the cost. [15,16] Currently, numerous studies on Ni-rich LNCMO materials mainly focus on the material modification, including doping with other elements, [17,18] coating with compounds, [19,20] synthesis of spherical concentration gradient or core-shell structure.…”